21561560

素因数分解:

$2^3\times 5^1\times {\mathrm{539039}}^1$

素因数の和:539050

約数の個数: 16

約数和(自身を含む): 48513600

約数和(自身を除く): 26952040

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 539039, 1078078, 2156156, 2695195, 4312312, 5390390, 10780780, 21561560]

約数ペア:

[(1, 21561560), (2, 10780780), (4, 5390390), (5, 4312312), (8, 2695195), (10, 2156156), (20, 1078078), (40, 539039)]